Drier drain system.



No. 896,055. PATENTED AUG. 11, 1908. W. G. CLARK.

DRIER DRAIN SYSTBM. APPLIOATION Flynn A23. 25, 1908.

3!. W5 Witnessesf Inventor cZ /bflwg Y MWEM W1. 5. dlw- Attorney WILLIAMG. CLARK, OF TERRE HAUTE, INDIANA.

DRIER DRAIN SYSTEM.

Specification of Letters Patent.

Application filed April 25, 1908- Patented Aug. 11, 1908.

Serial No. 429,128.

To all whom it may concern:

Be it known that I, WILLIAM G. CLARK, a citizen of the United States,residing at Terre Haute, Vigo county, Indiana, have invented certain newand useful Improvements in Drier Drain Systems, of which the followingis a specification.

In steam heated driers, as employed in paper mills for instance, greatdifficulty is experienced in getting rid of the water of condensation inthe driers. Such driers are generally employed in a group involvingquite a number of rotary drying cylinders and, under prevailing systems,no matter what precautions may be taken, it is practically impossible toknow whether or not any or all of the driers are being properly emptiedof water so as to perform their proper drying duty. Traps have beenintroduced between the individual driers and the discharge main, andglass gages on these traps indicate the level of the body of waterretained in the trap, but the constancy of this level in the trap is noevidence whether a given driver is working properly, or is over-chargedwith water, or is blowing steam through the drier without thecondensation incident to the proper abstraction of heat from it.

My invention will be readily understood from the following descriptiontaken in connection with the accompanying drawing in which:

Figure 1 is a side elevation of a group of drying cylinders fitted withmy improved draining system: Fig. 2 a vertical longitudinal section ofone end of one of the drying cylinders: and Fig. 3 a verticallongitudinal section of the neck-connections at one of the cylinders. Adiversity of scales is employed in the several figures of the drawing.

In the drawing :-1 indicates general frame work: 2, the cylindricaldriers: 3, the necks of the driers through which the steam is injectedand the water ejected: 4, the steam supply main: 5, a branch pipe, onefor each drier, leading from the steam supply main to the neck of thedrier so as to discharge steam to the interior of the drier, these pipesbeing provided, as usual, with stop valves for the control of the flowof steam through them: 6, the usual dip pipe in each drier, this pipepresenting its open end near the floor of the interior of the drier andpassing axially through the neck of the drier, and through the steam-waythrough the neck: 7, a drain pipe connected with the outer end of eachdip pipe: 8, a steam trap, of usual construction, at the end of eachdrain pipe: 9, the water discharge main which is to convey the condensedwater from the driers to any desired point, such as hot well or heateror boiler: 10, a funnel leading into the discharge main at each trap:and 11, a discharge spout from each trap, in position to discharge intoone of the funnels.

In operation, steam from the supply main goes into and fills the driers;it parts with heat through the metal of the drier walls; condensationoccurs and water accumulates in the base of the driers the pressure ofthe superincumbent steam in the driers forces this water outwardlythrough the discharge pipes and into the traps; the water accumulates inthe traps; the usual float or other controlling devices in the trapscauses water to discharge from them when the accumulation rises abovethe predetermined level in the traps; the water discharging from thetrap-spouts falls into the funnels and goes to the discharge main andthence away; the usual glass gages on the traps indicate the level ofwater therein; the usual air valves on the traps provide for thedischarge of air therefrom.

Steam tra s are at all times liable to misbehavior and t e neckconnections between the drier necks and the inlet and discharge pipesare subject to disorders. These troubles are of hidden character and amere observation of the height of water in the traps, as indicated bythe gages, insures no certainty that the driers are behaving properlyand working under steam or are not air bound or are not flooded. But inthe present case the rate of flow of water from the individual drierscan be observed and the working conditions judged of, and properconditions arranged for in case of apparent disorder. Other things beingequal, a given drier if air bound will not be discharging water into itsfunnel in pro er quantity, and the same will be the case i' the givendrier be flooded, and the same will be the case if, by disorder of theneck-connections there be an improper direct connection between thesteam inlet and the water outlet. In case of any observedmisperformance, as judged by the individual discharges of water, thesteam may be shut off from the appropriate drier and the defect may thenbe deliberately inquired into and remedied.

I claim A drier drain system comprising, a plurality of rotary dryingcylinders, a steam supply main, individual branch conduits leading fromthe steam supply main to the interior of the several driers throughtheir necks, a dip pipe leading from the base of each drier through theneck thereof, a Water discharge pipe connected with the outer end ofeach dip pipe, a steam trap at the outlet end of each water dischargepipe, a Water discharge main having a receiving opening at each trap,and a discharge spout connected with each trap and open at its outer endto the atmosphere and adapted to drop its discharge into the appropriateopening in the Water discharge main, combined substantially as 20 setforth.

WILLIAM G. CLARK.

Witnesses 2 E. BALL, 2

H. WASHBURN.

